#define RFC2132_MSG_TYPE 53
#define RFC2132_SRV_ID 54
#define RFC2132_PARAM_LIST 55
+#define RFC2132_MESSAGE 56
#define RFC2132_MAX_SIZE 57
#define RFC2132_RENEWAL_TIME 58
#define RFC2132_REBIND_TIME 59
#define DHCPOFFER 2
#define DHCPREQUEST 3
#define DHCPACK 5
+#define DHCPNAK 6
#define RFC1533_VENDOR_MAJOR 0
#define RFC1533_VENDOR_MINOR 0